<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <script>
        var obj = { x: 1, y: 2, z: 3 };
       let cc =  {...obj}
       console.log(cc)
// [...obj]; // TypeError 
    </script>
</body>
</html>